Question

X+y=20 2x+2y=18 por método de reducción​

Answer 1

x-y = 20 ---(1)

2x+2y=18---(2)

=multiply equation (1) by 2+- =

=x2 = 2x-2y = 40

elimination method =

2x-2y=40

+ 2x+2y=18

-------------------

4x + 0 = 58

x=58/4 = 14.5

Hope it is correct